sometimes the answer to a problem should be all too obvious

Grumpy

The Grumpy Grease Monkey mechanical engineer.
Staff member
I got asked to come over to a friends house to help diagnose a problem he was having after replacing a failed fuel pump!
I get over to his garage and ask him what the problem seemed to be and of course what symptoms and what parts were changed or adjusted recently?
well hes got a 1980s something chevy truck and its had a 350 SBC with a 600 holley that has run rather well for years, but recently the manual fuel pump failed.......he removed it and replaced the manual pump with an electric fuel pump , similar to this one, he got for $50 at a local auto parts store
CRT-P74029.jpg

and he removed and blocked off the manual fuel pump location on the block.
obviously the fuel supply line into and out of the manual fuel pump was spliced.
youll need the fuel pump mounting adapter plate and gaskets
trd-2310_w.jpg

http://www.summitracing.com/parts/spe-42493?seid=srese1&gclid=COWu1Lu61MYCFYsWHwodwNANjQ
42493.jpg


fpp4.jpg


the problem was that the truck ran ok for about a week then the dirt cheap electric fuel pump stopped working, so he replaced it with a NEW electric fuel pump he purchased off E-bay.
for again about $50 ....
that looked like this
CRT-P74001_ml.jpg

so I get over to his home and I ask him to try starting the car and gas is squirting out of the carburetor vents under pressure!
I tell him to stop trying to start the car and I disconnect the fuel feed line from the carburetor and hook up a fuel pressure gauge...... I get 13 PSI!
vgauge.gif

I showed him the test gauge , and explained that he would need to install a return fuel line and fuel pressure regulator to run that fuel pump
I suggested he reinstall a manual fuel pump as a decent fuel pressure regulator and the mods would cost more to fabricate and install.
CRT-M4513_EG_ml.jpg

https://www.summitracing.com/parts/crt-m4513
http://www.partsgeek.com/gbproducts/DC/13972-05008577.html
 
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